embdrv/sbc/encoder/srce/sbc_dct_coeffs.c

/******************************************************************************
 *
 *  Copyright 1999-2012 Broadcom Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  This file contains the coefficient table used for DCT computation in
 *  analysis.
 *
 ******************************************************************************/

#include "sbc_encoder.h"
/*DCT coeff for 4 sub-band case.*/
#if (SBC_FAST_DCT == FALSE)
const int16_t gas16AnalDCTcoeff4[] = {
    (int16_t)(0.7071 * 32768),  (int16_t)(0.9239 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(0.9239 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(0.3827 * 32768),
    (int16_t)(0.0000 * 32768),  (int16_t)(-0.3827 * 32768),

    (int16_t)(-0.7071 * 32768), (int16_t)(0.3827 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(0.3827 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(-0.9239 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(0.9239 * 32768),

    (int16_t)(-0.7071 * 32768), (int16_t)(-0.3827 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(-0.3827 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(0.9239 * 32768),
    (int16_t)(0.0000 * 32768),  (int16_t)(-0.9239 * 32768),

    (int16_t)(0.7071 * 32768),  (int16_t)(-0.9239 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(-0.9239 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(-0.3827 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(0.3827 * 32768)};

/*DCT coeff for 8 sub-band case.*/
const int16_t gas16AnalDCTcoeff8[] = {
    (int16_t)(0.7071 * 32768),  (int16_t)(0.8315 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(0.9808 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(0.9808 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(0.8315 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(0.5556 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(0.1951 * 32768),
    (int16_t)(0.0000 * 32768),  (int16_t)(-0.1951 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(-0.5556 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(-0.1951 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(0.8315 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(0.8315 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(-0.1951 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(-0.9808 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(-0.5556 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(0.5556 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(0.9808 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(-0.9808 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(0.5556 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(0.5556 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(-0.9808 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(0.1951 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(0.8315 * 32768),
    (int16_t)(0.0000 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(-0.1951 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(-0.5556 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(0.1951 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(0.1951 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(-0.5556 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(0.8315 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(-0.9808 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(0.9808 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(0.5556 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(-0.1951 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(-0.1951 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(0.5556 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(0.9808 * 32768),
    (int16_t)(0.0000 * 32768),  (int16_t)(-0.9808 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(0.8315 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(0.9808 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(-0.5556 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(-0.5556 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(0.9808 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(-0.1951 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(0.8315 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(0.1951 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(0.1951 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(-0.8315 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(0.1951 * 32768),
    (int16_t)(-0.7071 * 32768), (int16_t)(0.9808 * 32768),
    (int16_t)(-0.9239 * 32768), (int16_t)(0.5556 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(-0.5556 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(-0.9808 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(-0.9808 * 32768),
    (int16_t)(1.0000 * 32767),  (int16_t)(-0.9808 * 32768),
    (int16_t)(0.9239 * 32768),  (int16_t)(-0.8315 * 32768),
    (int16_t)(0.7071 * 32768),  (int16_t)(-0.5556 * 32768),
    (int16_t)(0.3827 * 32768),  (int16_t)(-0.1951 * 32768),
    (int16_t)(-0.0000 * 32768), (int16_t)(0.1951 * 32768),
    (int16_t)(-0.3827 * 32768), (int16_t)(0.5556 * 32768)};
#endif